gistfile1.txt

# Run flake8 against any added/modified python files in the current git repo.
function check8 ()
{
    errors=`git diff --relative --name-only --diff-filter AM --ignore-submodules | grep -e "\.py" | xargs flake8`
    retval=$?

    # xargs returns 127 if flake8 couldn't be found
    if [ "$retval" = "127" ]
    then
        echo "Failed to find flake8.  Check your virtualenv?"
        return 127
    elif [ "$retval" != "0" ]
    then
        echo "Errors Found:"
        echo "${errors}"
        return "$retval"
    else
        echo "No errors found."
        return 0
    fi

    # If errors is not empty
    if [ ! -z "$errors" ]
    then
        echo "Errors Found:"
        echo "a${errors}b"
        return 1
    else
        echo "No errors found."
        return 0
    fi
}